The Best Day2 is the second Japanese best album by DAY6. It was released on December 4, 2019.
The songs are a selection from the group's 2018 and 2019 Korean releases, in their original Korean version. Four new songs in Japanese are also included: "Finale", "Kiminara", and the Japanese versions of "Time of Our Life" and "Sweet Chaos".
"Finale" was pre-released on October 23.
The physical release comes in seven versions: a regular CD edition, a limited CD+DVD edition and five limited member editions. On digital platforms, the album was released as a four-track EP including the four new songs.